Polyurethane Polyvinylidene pinpoint mode organic_polymer Wafer Mechinical UnivCollegeLondon Multiferroic_materials frequency_modulation Phosphide Spincast alkanes FM_KPFM SThM Ram molecular_beam Pyroelectric FrictionForce PetruPoni graphene_hybrid Wildtype Electical&Electronics HexacontaneFilm Hexylthiophene amplitude_modulation Domain Lattice GaP Gold HafniumDioxide SPMLabs PrCurve Ucl Crystal PolyvinylAcetate